Abstract
In this work, the details of a numerical investigation carried out on the flow and heat transfer characteristics in the wavy pillow plate channels used for pillow plate heat exchangers have been presented. Water is used as the cooling medium. It is observed that in the thermally developing region, the recirculation zone contributes a higher proportion in the total heat transfer as compared to the thermally developed part. High heat transfer is observed in the developing region is due to the lower average temperature of the hot recirculating zones. Further, a parametric study is conducted by varying the geometric parameters of the channel. The study is based on the transversal and equal pitch pillow plate configurations. The numerical results are validated against the experimental results available in the literature. Based on the numerical results, a heat transfer correlation is developed. Also, a sensitivity analysis is carried out to quantify the effect of various geometric parameters and Reynolds number on the thermo – hydraulic performance of the pillow plate channel.
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